Tooluxe 04158L 1/4" Socket Wrench Extension Bar Set, 3 Pieces, Extra Long (12", 15", 18") Long reaching extension bar grants access to fasteners in hard to reach areas in tight, narrow spaces Drop forged, heat treated carbon steel construction withstands heavy duty operation providing high durability and extra strength Stainless steel chrome plating finish is corrosion resistance and prevents rust to maximize tool life Three sizes come in 12. 15, and 18-inch extensions to work with a wide range of applications Spring loaded ball at the end of bar locks socket into place for security and prevents dropping